Collapsible core-barrel.



PATENTD JANJ15, 1907.

G. DU R. PAIRLBIGH. COLLAPSIBLB GORE BARREL.

APPLICATION FILED AUGZZ. 1905.

2 SHEETS-SHEET l.

rNE rlaRRls PE Rs c GEORGE DU R. FAIRLEIGH, vOF CHICAGC, ILLINOIS.

COLLAPSlBLE CORE-BARREL.

Specification vof Letters Patent.

Patented Jan. v15, 1907.

Application filed August 22. 1905. Serial No. 275.195.

T0 fr/ZZ whom, it may concern:

Beit known that I, GEORGE DU R. FAIR- LEIGH, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have made certain new and -useful Improvements in Collapsible Core-Barrels, of which the following is a specification.

In casting iron pi es an iron shell or cylinder is usually emp oyed upon which a hay rope is wound to form an elastic body or Jfoundation, which is subsequently covered with plastic clay. Such shell is provided with central end bearings, so that it may beI placed in an apparatus wherein it may be revolved for turning or scraping off the clay covering, so as to make a true cylinder. This method of forming a core involves time, labor, and expense, which are greatly economized by my invention, which is a core-barrel constructed of metal and adapted to be contracted and expanded.

The details of construction, arrangement, andoperation of parts are as hereinafter described and claimed, reference being had to the accompanying drawings, in whichd Figure 1 is a side view of my improved collapsible core-barrel. Fig. 2 is a practically central longitudinal section of the same. Fig. 3 is a transverse horizontal section-on the line 3 3 of Fig. 2. Fig. 4 is a detail section illustrating the means for locking the collapsible barrel or shell in either the contracted or expanded position. Fig. 5 is a cross-section of the barrel or shell when collapsed as shown in Fig. l. Fig. 6 is a perspective view ofthe upper head of the apparatus. Fig. 7 is a sectional view of the core-barrel proper in the expanded position. Fig. 8 is a plan view of a cruciform device which serves as a bridge7 or support for the movable section of the core-barrel. Figs. 9 and l() are perspective views of a wedge and an inclined bearing therefor which serves as means for forcing the barrel-sections outward when the core-barrel is to be expanded. Fig. ll is a perspective view of the lower head ofthe sliding frame and one of the link attachments by which the lower ends of the movable barrel-sections are connected with such head. Fig. l2 is a perspective sectional view of the locking device by which the core-barrel proper is held in the contracted or expanded position.

As shown in Figs. 1 2, 5, 7, a core-barrel or shell A is formed of a series of such sections l, which are curved transversely and whose side edges overlap and are adapted to slide uponV each other when the barrel is being contracted or expanded. It will be noted that the parts which slide in contact are straight and parallel, while the intermediate portions are curved, so that the barrel-or shell as a whole is practically cylindrical. The several sections 1 are connected with a slidable skeleton frame B, which is composed of four bars 2, attached at vtheupper end to a cast-metal head C, (see Fig. 6,) at-the lower end to a cast-metal head D, (see Fig. 11,) and at intermediate points within the core-barrel A by wedge-shaped blocks E.

. The said frame B, composed of bars 2 andthe several 'blocks C D E, 1s adapted 'to slide on-a central rod F, which extends at each end beyond the frame and the core-barrel A, the lower end being provided with a large square knob 3, which-in practice centers in the chillplates now in use in connection with ask and core-barrels, so that the necessity of making new chill-plates conforming to the round end is obviated. Thus while the collapsible core-barrel A is adapted to slide endwise on the skeleton frame B the said frame is in turn adapted tos'lide on the-central rod F, by which operation the core-barrel proper is contracted or expanded as required.

The cruciform heads C and B (see Figs. 2, 6, and 11) are provided with central vertical openings 4 and 5, respectively, to receive the Vcentral rod F, and which are provided with fourlateral lugs or wings 6 and 7, respectively, which are arranged at right anglesto each other and tangentially to the respective openings 4 5. The four'bars 2, constituting the main portion of the sliding frame B, are attached to the two heads C D, being laid in the angles formed bythe wings 6 and 7 and secured by rivets, as show-n. The head C serves for use in adjusting the frame Bas a whole and .for points of attachment `for cranehooks for pulling the collapsible core-barrel out of a casting, as will be readily understood by those skilled in the art. The cruciform device or bridge G (see Figs. l, 2, 8) is held fixed on the rod F by means of a clampscrew passing through the boss formed onits lower side.

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`port for the sections As shown in Fig. 8, there are four pairs of lateral arms 8, which are separated by slots having a width slightly greater than the thickness of the bars 2 of frame B, so that said bars may slide freely vertically therein. Theupper sides of the said arms areprovided with. webs or vertical flanges 9 for strengthening the bridge as a whole. This bridge, which is arranged between the middle and upper end of the rod F, serves as a sup- 1 of the core-barrel proper when being moved inward or outward for contracting or expanding the same.

As shown in Figs. 1 and 2, each section 1 of the core-barrel is provided with an attachment 10, consisting of a short bar, which is screwed to the section at the upper end and on the outer side of the same and projects upward in a slot of bridge G and is connected with a bar 2 of the frame B link 11.

by means of a The outer end of the link is loosely connected with the pivot by means of a lengthwise slot, as shown in Fig 1. Intermediately of this pivotal attachment of the link and the horizontal arm of the bridge is ,arranged aroller 12, which serves as a bearing on which the lattached section moves in and out. In other words, the several rollers' 12 are adapted to roll on ways provided in the arms 8 of bridge G, so that the inward and outward movement of the barrel-sections 1 in contracting and expanding is greatly facilitated. The lower head D (see Figs. 2 and 11) is connected by links 11a with lugs 10a, which are riveted to the inner sides of barrelsections 1. As shown in Fig. 2, the sections referred to are provided with slots to provide space for free operation of the links 11a.

Intermediately of the bridge G and the lower head D (see Fig. 2) is arranged a series (preferably four) of bearings composed ofthe wedge E (see Figs. 9 and 10) and the incline The wedge has a central opening 13, which adapts it to slide on the rod F, and at laterally opposite points it is provided with two lateral vertical iianges 14, which are spaced apart to adapt them to receive opposite bars 2 between them and which are also inclined on the lower side, as shown at 14a, Fig. 9. The wedge E is secured to the opposite bars by rivets, 'as shown in Fig. 2. The parts F/ are secured by screws or rivets to the inner sides of opposite barrel-sections 1 and at such points that the inclined portions 14a of the wedges E are adapted to slide on the inclines 15. (See Fig. 10.) The wedges E and the bearings E are always in contact, as shown in Fig. 2, and when the frame B is sliddownward on the rod F it is apparent that sections 1 will be forced outward by the wedge action, or, in other words, that the core-barrel will be expanded, and, contrariwise, when the frame B is drawn upward on the-rod F the barrel-sections 1 may be collapsed or drawn inward. While the wedges means: The upper ends of three of the four rods 2, constituting the main portion of the frame B, are connected by a metal plate 1 6, (see Figs. 1, 2, and 4,) the same being secured to the heads of the bars by screws. Between this plate 16 and the upper cast-metal head C is arranged a rotatable sleeve or barrel H, (see Figs. 1, 2, 3, 4, 12,) the saine being provided interiorly with horizontal ribs- 17, which are arranged parallel and separated vertically as well as transversely at opposite points. Thus there are practically four ribs, arranged in pairs opposite each other and separated at their ends. provided with two sets of pins 1S, projecting laterally at opposite points and adapted to pass .through the spaces provided between the ribs 17. Cn one side the sleeve II is further provided with parallel lugs 19, between which is pivoted the head of a curved lever 20, and a plate-spring 21 (see Figli) is arranged between the head of the lever and the side of the sleeve for the purpose of holding the lever in either the pendent or elevated position. (Illustrated by full and dotted lines in Figs. 1 and 4.) As will be seen in Fig. 2, the

vcast head C is provided below the sleeve I-I with two parallel lengthwise grooves 22, in which the pins 18 of rod F may slide.

It'willnow be understood that when the upper head C is pushed down the bars 2 of frame B, being also carried downward, force the wedges E against the corresponding inclines E, and thus force the shell or barrel A to expand, as shown in Figs. 2 and 7. In other words, the barrel is expanded to the required diameter for the pipe which is to be cast. In this case the lever 2O having been raised to a horizontal position is turned to the left and may be turned down into pendent position between the wings 6 of the head C. Thus the lever serves, primarily, for rotating the sleeve H, and, secondarily, when in the pendent position it locks the lsleeve against any'possible accidental rotation. This movement of the lever carries the lockingsleeve II one-quarter round. The entire apparatus is then placed in a mud-lathe and given a coating of clay mud, thus forming a true even cylindrical surface. The whole is then placed in an oven and baked dry, after which the apparatus is put into a flask in which a mold of the pipe or casting desired has been already formed, and the distance between the core-barrel and the mold will be the thickness of the pipe orl casting. Into The rod F is IOO IIO

this space surrounding the core-b arrel molten iron or other molten metal is poured. After the metal has been poured and su'Hicient time has elapsed to allow due cooling and solidi'fication the core-barrel is collapsed and drawn out. that the locking-lever 20 shall be raised and thrown around to the right, which will release the pins 1S from the horizontal spaces between the ribs 17 of the sleeve H and bring the vertical space between the ends of said ribs into coincidence with the pins, so that the latter may slide therein. In other words, by this movement of the lever 20 and the sleeve S the head C, and therebyT the entire frame B, is unlocked from the rod F. Then the hooks of a crane are applied under the lugs or wings 6 of head (l and the corebarrel is pulled out of the flask. ln this operation the weight of the core-barrel proper causes the pivoted links 11 11"l to drop from an approximately horizontal position (shown in Fig. 2) into the inclined position indicated in Fig. 1.

lt will be noted in Figs. lower pin 18 of rod F is in the lower groove of the sleeve H or between the parallel ribs 17 this being the position by which the corebarrel A is locked in the expanded position. On the other hand, in Fig. 4 the upper pin is below the sleeve H, which is the position required to lock the core-barrel in the contractedposition. (ShowninFigsland.) By the arrangement of the series of pins 18 and a series of grooves in the sleeve H provision is made for locking the sections 1 of the corebarrel in the contracted position and in the most expanded and .lso in one or more intermediate or less expanded positions. In other words, the core-barrel is capable of making two sizes of pipe and possibly three sizes. Thus a barrel may be made to make a four-inch, six-inch, and eight-inch, or a teninch, twelve-inch, or fourteen-inch pipe.

As is well known to those acquainted with the art, the core-barrels in general use are adapted to make only one size of pipe, so that an assortment of barrels must be kept on hand and handled and substitution made when the size of pipe is to be changed.

That l claim is- 1. A collapsible core-barrel comprising a barrel proper formed of a series of longitudi nal sections having overlapping side edges, a rod extending centrally tnrough the barrel, and a frame arranged intermediately of the rod and barrel proper, and comprising parallel bars and means for rigidly connecting them whereby they are adapted to slide on the rod, means for loosely but positively connecting the sections of the core-barrel with said bars, whereby the said sections are turned inward when said frame tral rod and coacting inclines whose parts are 2 and 3 that the For this purpose it is necessary slides upward on the cenl applied to the frame and the barrel, whereby, when the said frame is adjusted on the rod, the sections of the barrel proper may be expanded in the manner described.

2. The improved collapsible core-barrel comprising a central rod, upper andlower cruciform heads adapted to slide thereon, a series of bars connecting said heads and vrig idly attached thereto, and a core-barrel proper comprising a series of longitudinal sections which overlap at the sides, pivoted links connecting the sections with the bars of the frame, and means frame and sections, whereby, when the frame is forced downward, the sections are expanded and when drawn upward the sections are contracted substantially as described.

3. A collapsible core-barrel comprising a central rod, a bar-frame adapted to slide thereon, and the core-barrel proper inclosing said frame and consisting of a series of longitudinal plate-sections havingv overlapping side edges which are parallel to and adapted to slide one on the other, the said frame and sections having respectively guide-pieces E, E', whose inclined edges are arranged to slide in contact, and means connecting the frame and sections at their ends to cause the required radial and sliding movements of the same, as described.

4. In a collapsible core-barrel of the character indicated, the combination, with a central rod and a series of longitudinal sections composing the barrel proper, a cruciform piece, or bridge, secured to the upper portion of the rod and having parallel lateral arms provided with slots forming guideways, a frame which is slidable on the rod and includes bars passing through the said bridge, devices attached to the upper ends of the barrel-sections and arranged in the slots or guideways, rollers pivoted to such devices and adapted to run and links connecting said devices with the aforesaid frame, substantially as described.

5. ln a collapsible core-barrel of the character indicated, the combination, with a cenn tral rod and a rigid structure adapted to slide thereon, of a collapsible barrel formed of longitudinal sections, a horizontal support secured to the upper portion of the rod, and means connecting said support with the said sections whereby they are supported While being forced inward and outward, substantially as described.

6. In a collapsible core-barrel of the character described, the combination, with a central rod having one or more lateral projections at its upper end, a frame adapted to slide vertically on said rod, the collapsible core-barrel proper, connected with said frame, of a device for locking the core-barrel in the contracted or expanded position, the

connected with the` on the arms of the bridge,

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. is adapted, wlien rotated,

saine being applied to the rod 'and slidable frame, whereby it slides with the latter and to engage with. and disengage from the projections, substantially as described.

7. The combination, with the collapsible barrel comprising longitudinal sections, a central rod having near its upper end lateral projections and a frame adapted to slide on the rod and operatively connected with the barrel-sections, of a rotatable looking device applied to the upper portion of the frame and comprising a sleeve having opposite ribs whichare separated vertically, whereby said sleeve is adapted for engaging the projections of the rod when rotated to a certain position and to be disengaged from and slide over the ro'ections when ad'usted inb an- P l l other position, substantially as described.

8. The combination, with the collapsible core-barrel, a central rod having lateral projections near its upper end, and a frame interposed between the barrel and rod and operatively connected with the barrel-sections and adapted to slide on said rod, and a locking device comprising a sleeve having internal. ribs which are separated vertically and adapted to engage pro'ections of the rod, said device having a lateral lever for rotating it, substantially as described.

GEORGE DU R. FAIRLEIGH.

Vitnesses W. G. SAVAGE, ALFRED HOLLEY. 

